Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) - USD ($)
6 Months Ended 12 Months Ended
May 31, 2018
Nov. 30, 2017
Income Tax Contingency [Line Items]    
Federal and state tax rate 24.13% 36.45%
Higher rate due to tax law effective rate 25.19%  
Accounting Standards Update 2015-07    
Income Tax Contingency [Line Items]    
Reclassification from current deferred tax assets   $ (2,079,988)